3 Ebola Travelers Fly Monthly, Spreading Disease: Study

Passengers arriving from Conakry in Guinea wait for their luggages at the airport in Abidjan on October 20, 2014 as Ivory Coast's airline resumed flights to the three west African countries worst-hit by Ebola -- Guinea, Liberia and Sierra Leone. (Issouf Sanogo/AFP/Getty Images)

Ebola is known to have killed more than 4,500 people in West Africa, Reuters reported, and the World Health Organization estimates the true toll to be closer to 12,000 after unreported cases are factored in.

Dr. Kamran Khan of St Michael's Hospital in Toronto, Canada, who led the research study, told Reuters that excessive constraints on air travel could have "severe economic consequences that could destabilize the region and possibly disrupt critical supplies of essential health and humanitarian services."